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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "avassert.h"
#include "macos_kperf.h"
#include "thread.h"
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#define KPERF_LIST \
F(int, kpc_get_counting, void) \
F(int, kpc_force_all_ctrs_set, int) \
F(int, kpc_set_counting, uint32_t) \
F(int, kpc_set_thread_counting, uint32_t) \
F(int, kpc_set_config, uint32_t, void *) \
F(int, kpc_get_config, uint32_t, void *) \
F(int, kpc_set_period, uint32_t, void *) \
F(int, kpc_get_period, uint32_t, void *) \
F(uint32_t, kpc_get_counter_count, uint32_t) \
F(uint32_t, kpc_get_config_count, uint32_t) \
F(int, kperf_sample_get, int *) \
F(int, kpc_get_thread_counters, int, unsigned int, void *)
#define F(ret, name, ...) \
typedef ret name##proc(__VA_ARGS__); \
static name##proc *name = NULL;
KPERF_LIST
#undef F
#define CFGWORD_EL0A32EN_MASK (0x10000)
#define CFGWORD_EL0A64EN_MASK (0x20000)
#define CFGWORD_EL1EN_MASK (0x40000)
#define CFGWORD_EL3EN_MASK (0x80000)
#define CFGWORD_ALLMODES_MASK (0xf0000)
#define CPMU_NONE 0
#define CPMU_CORE_CYCLE 0x02
#define CPMU_INST_A64 0x8c
#define CPMU_INST_BRANCH 0x8d
#define CPMU_SYNC_DC_LOAD_MISS 0xbf
#define CPMU_SYNC_DC_STORE_MISS 0xc0
#define CPMU_SYNC_DTLB_MISS 0xc1
#define CPMU_SYNC_ST_HIT_YNGR_LD 0xc4
#define CPMU_SYNC_BR_ANY_MISP 0xcb
#define CPMU_FED_IC_MISS_DEM 0xd3
#define CPMU_FED_ITLB_MISS 0xd4
#define KPC_CLASS_FIXED_MASK (1 << 0)
#define KPC_CLASS_CONFIGURABLE_MASK (1 << 1)
#define KPC_CLASS_POWER_MASK (1 << 2)
#define KPC_CLASS_RAWPMU_MASK (1 << 3)
#define COUNTERS_COUNT 10
#define CONFIG_COUNT 8
#define KPC_MASK (KPC_CLASS_CONFIGURABLE_MASK | KPC_CLASS_FIXED_MASK)
static void kperf_init(void)
{
uint64_t config[COUNTERS_COUNT] = {0};
void *kperf = NULL;
av_assert0(kperf = dlopen("/System/Library/PrivateFrameworks/kperf.framework/Versions/A/kperf", RTLD_LAZY));
#define F(ret, name, ...) av_assert0(name = (name##proc *)(dlsym(kperf, #name)));
KPERF_LIST
#undef F
av_assert0(kpc_get_counter_count(KPC_MASK) == COUNTERS_COUNT);
av_assert0(kpc_get_config_count(KPC_MASK) == CONFIG_COUNT);
config[0] = CPMU_CORE_CYCLE | CFGWORD_EL0A64EN_MASK;
// config[3] = CPMU_INST_BRANCH | CFGWORD_EL0A64EN_MASK;
// config[4] = CPMU_SYNC_BR_ANY_MISP | CFGWORD_EL0A64EN_MASK;
// config[5] = CPMU_INST_A64 | CFGWORD_EL0A64EN_MASK;
av_assert0(kpc_set_config(KPC_MASK, config) == 0 || !"the kperf API needs to be run as root");
av_assert0(kpc_force_all_ctrs_set(1) == 0);
av_assert0(kpc_set_counting(KPC_MASK) == 0);
av_assert0(kpc_set_thread_counting(KPC_MASK) == 0);
}
void ff_kperf_init(void)
{
static AVOnce init_static_once = AV_ONCE_INIT;
ff_thread_once(&init_static_once, kperf_init);
}
uint64_t ff_kperf_cycles()
{
uint64_t counters[COUNTERS_COUNT];
if (kpc_get_thread_counters(0, COUNTERS_COUNT, counters)) {
return -1;
}
return counters[0];
}
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